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adam_jeff wrote:Those very energetic 10^20eV particles (in fact they don't need to be that energetic)...

10^20 eV particle hitting a stationary target makes as energetic collision as two 10^10 eV particles colliding head-on - so in fact to be accurate it is necessary to look for such high energy particles to be able to see effects of what's going to happen in LHC happening naturally in our neighborhood.
There sure are not too many of them but there are enough to be reasonably certain that even head-on collisions of two such particles happen occasionally somewhere in the space.

And encountered this information (p.93-94-95) regarding frequencies of collisions: 800 million collisions per second for 10 to 20 hours, and energies that supposedly 'don't need to be that energetic' are in the case of Lead collisions: 575 trillion electron volts per nucleus.

check it out:

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